# Structural Engineering Calculator to Analyze Wood / Lumber Members in Bending and Shear per NDS 2015

May 4, 2018 Abdul Siraj, P.E.

## Calculator Description

This online engineering calculator computes the actual bending and shear stresses and allowable bending and shear stresses for a wood sawn lumber member in bending and shear according to the National Design Specification for Wood Construction 2015 (NDS 2015)

https://www.engineeringexamples.net/engineering-calculator-for-analysis-of-wood-sawn-lumber-member-in-bending-and-shear-nds-2015/

## Input Parameters

Bending Moment, M

Member Width, b

Member Depth, d

Load Duration Factor, Cd – NDS 2015, Section 4.3.2

Wet Service Condition Factor, Cm – NDS 2015, Section 4.3.3

Temperature Factor, Ct – NDS 2015, Section 4.3.4

Beam Stability Factor, CL – NDS 2015, Section 4.3.5

Size Factor, CF – NDS 2015, Section 4.3.6

Flat Use Factor, Cfu – NDS 2015, Section 4.3.7

Incising Factor, Ci – NDS 2015, Section 4.3.8

Repetitive Member Factor, Cr – NDS 2015, Section 4.3.9

Reference Bending Stress, Fb – NDS Supplement 2015

Reference Shear Stress Parallel to grain, Fv – NDS Supplement 2015

## Output Parameters

Cross-Sectional Area, A

Section Modulus, Sx

Actual Bending Stress, fb

Actual Maximum Shear Stress, fv

Allowable Bending Stress, Fb‘ – NDS 2015 Table 4.3.1

Allowable Shear Stress Parallel to Grain, Fv‘ – NDS 2015 Table 4.3.1

Bending Check

Shear Check